2001 Silverado Z-71 wont start

I have a 2001 Silverado Z-71. Several years ago my headlights started flickering and I found the trouble in a broken wire on the Multi Function Switch wiring harness where it plugs to the MFS. I repaired the broken wire and it's worked great until last week. The headlights went out again so again I looked at the MFS and found that the wire I repaired plus one more next to it were burned, slightly melting the wiring harness connector. Splicing new wires didn't work so I bought and installed a new MFS which came with a new wiring harness. Still no headlights and now I have no interior lights, no under hood light, no cargo light, the key remote wont work the door locks AND the truck wont start!:grrrrrr:

I have an MT2500 scan tool (Snapon brand) that will communicate with all vehicle functions except the Body Control Module. I think that I may need to reprogram the BCM or buy a new one. I retreived one DTS code, P1626 Vehicle Theft Deterent, so the truck is in lock down (turning off the injectors).:gasp:

Has anyone had this problem? My Chevy dealer is stumped (which is usual for them) and I don't want to tow my truck to them so they can keep it for a month a charge me $2000.:fighting0019:

Hi, and welcome to the site! I hope someone here can help you. I knew someone who had a 1999 Chevy Silverado Z71 that would not start, and he found in his owners manual how to reset a switch that shuts down the fuel system after a crash, but he was not in one. Something caused it to trip.So far he has not had anymore problems. (that I know of). Hope this helps. Good Luck.